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1. A water trough has a semicircular cross section with a radius of 0.25m and a length of 3m 3 m 0.25 m (a) How

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1. A water trough has a semicircular cross section with a radius of 0.25m and a length of 3m 3 m 0.25 m (a) How much work is required to pump the water out of the trough when it is full? (b) If the length is doubled, is the required work doubled? Explain. (c) If the radius is doubled, is the required work doubled? Explain

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